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UNITED sTATEs PATENT oEEioE.

T. J. VOLFE, OF BALTIMORE, MARYLND.

` rUMP.

Specification of Letters Patent No. 3,1529, dated April l0, 1844.

To all whom t may concern i Be it kno-wn that I, T. JEFFERSON IITOLFE, of the city of Baltimore, in the State ot Maryland, have invented a new and useful Improvement in Pumps, and that the following is a full and exact description of thev construction `and operation of the same.

In `the annexed drawings Figure l represents a vertical section of the upper part ot the pump, and Fig. 2 a vertical section of the lower part of the same.

he pump has two cylindrical bores, one near the center represented by b, through which the water is forced to the spout ot the pump when in operation. It is stopped at the upper end by a plug c, to preventthe introduction of stones, &c., andthe other a, ce, through which the. rod passes, from the handle to the forcing chamber. o

Il, is the handle similar to those in ordinary use, and cl, d, the rod attached thereto.

A is the forcing chamber the general form of which is the sector of a hollow cylinder. I construct it of cast iron, which I prefer. It consists ot two parts: First, the upper or stationary plate f, f, which is cast with a lange g on the upper side for attaching it by nails or screws to the pump stock to which it is adapted .For still greater security nails or screws may likewise be driven through the plate from the underside into the stock, as partly sho-wn in the drawing. This plate is perforated at, it, immediately under the bore l), Z),`and is furnished with a clapper valve z', of common construction which opens upward; 7c, 7c, is the lower plate perforated in two or more places, with valves at eachof common construction open# ing upward, one of which is shown at l; these plates j, f, and 7c, 7c, are united together at m, by awrought iro-n pin and water tight hinge cast on the edges of the plates.` cylindrical plate n, n, (of the radius m, m) and two sector-shaped end plates one of which is seen in a direct view at p, 29,; are attached by screws or otherwise to each other and to the edges ot the `lower plate 71e, la, (or they may be cast solid with the latter,) and complete the chamber. The plate n, n, is made true on the inner surface so as to keep it throughout its motions as close as possible in contactwith the edge (l,

the stationary plate f f. The foot of the pump stock rests on the bottom of the well and is notched out under the water line P, P as showninthe drawing, to receive the forcing chamber (which is wholly emersed i in the water) ata suiiicient height abo-ve the bottom of the well to prevent the sediment o beingagitated, and any interference with the valves from that cause.

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The lower partjof the rod-is bent atrph. i

and passes out through s, s, at the foot of the stock. It is then bent over the sideot the torcing chamber and attached by a j oint,

t, to the edge of the lower plate itl likewise j has a joint at w, to prevent strain, `for a similar purpose the rod is jointed near the i upper end at 1, and has a slip joint and band at e, for unshipping the fbent port-ion. The spout C, (which is represented detached trom the pump so as to `be better understood) is cast `with a male screw so that a hose, No. l, may be attached and used for various purposes. Its point of insertion into the pump is shown by the dotted circles 2, 2, 2. Immediately below it an extra valve D of common construction opening upward, is fixed stationary in the bore of the pump, the use of which `is to catch any matters passed through the spout to injure the pump, trom which point they may be removed without much trouble.

Section No. 3 is a section of the material parts of the pump when adapted to the double action, the same letters `used inthe description ofthe other sections referto similar parts in this. The chambers A, A however are narrower than the' stock and pass entirely through it, and the plates f f, as also 7c 7s, of each chamber are made in one piece the latter ,7c 7c working in a common center-.at m. Likewise for the bent portion of the rod a lever F having its center ot' inotion at G, is substituted,which works in an angular slot or mortise I, I, in the stock and -is attached to thelittingrods at 10,10, and to j the rods CZ, cl.

The waterbore Z) is branched at L as shown by the dotted lines and the handle II is attached to the center of motion of a short lever M to the extremities ot which the rods d, `l are made fast and are worked by moving the handle from side to side. The operation of this pump is similar to the single act-ion, except that while one chamber is filling in this the other is forcing, thus producing a continuous stream at the spout.

and causing `the pump to work lighter in consequence of one chamber being. nearly a counter-poise to the other'through all their motions.

` The drawings Figs. l aiid`2 represent the iio pump during the upward stroke or while the chamber A is filling. `When the handle H is raised the lower part (n n 7c lo) of the chamber A, is depressed, and the chamber is filled through the valves Z, Z, by bringing the handle down again, the valves Z, Z, close, the valve z' opens, and the water is forced up through the bore Z) b, the valve D, and the spout. Then a hose is attached, the water can be thrown to the top of a high three story house by the force o-f one man. Y

My pump possesses great advantages over thosein common use for city purposes. There is less friction, they are not so liable to get out of order, and the working part being made of iron is more durable. The pressure of the atmosphere not being used, the water may be forced at any height only limited to the strength of the materials to bear the pressure, in which latter respect it differs materially in its principle of operation from the bellows pump, as it is called, introduced into France many years since, in which the water is raised by atmospheric pressure, and which is made in part of leather, canvas or other flexible but perishable materials. Moreover the rod being placed in a separate bore from that made for the water, it is better preserved and the water in the stock is not impregnated with iron as in common pumps.

lVhat l claim as my invention in the above for which I ask Letters Patent of the United States, is-

1. The mode in which I have constructed my forcing pump, that is to say, by placing the forcing chamber constructed substantially as described under the water line, the valves and piston or connecting rod being arranged and operating substantially as set forth.

2. I also claim in combination with the above, placing the piston or connecting rod, and the discharging passage for the wat-er in separate bores of the pump log.

In testimony whereof l have hereunto set my hand this 27th day of March A. D. 1844.

T. JEFFERSON VVOLFE.

Vit-nesses WM. T. STEIGER, B. K. MoRsELL. 

